Question

Q2: Discuss the three cell types that can be distinguished based on capacity to grow and divide. Give an example for each type. [15% Points) 1. 2. 3.

Answer 1

Question

2. The 3 cell type that can be distinguish based on the capacity to grow and divide are :

I. Totipotent stem cell : these type of cells can be differntiate into any type of cells. These cell type can also be differentiated into extra embryonic cells.

2. Pluripotent stem cell: these type of cells can be differentiated into cells derived from three germ layers.

3. Multipotent stem cell: these type of cells can be differentiated into special lineage of cells.

5. Operon is a cluster of the genes that are transcribed together in case of prokaryotic organism. The main component of operon in the prokaryotic cells are:

I. Promoter

II.Operator

III. Repressor

IV. Structural genes

V. Inducer

6. The difference between inducible and repressible operon are:

Inducible	Repressible
Genes are normally off	Genes are normally on
Genes involved in catabolism pathway	Genes involved in anabolism pathway
Inducer molecule activate the transcription	repressor binds to the operator shuts off the transcription